Which statement best describes capacity in medical decision-making?

Which statement best describes capacity in medical decision-making?

• A. Capacity is global and fixed for all decisions.
• B. Capacity is decision-specific and time-specific.
• C. Capacity equates to legal competence.
• D. Capacity is determined solely by the patient’s age.

Answer: (B)

Capacity in medical decision-making means what a patient can understand and decide for a specific situation at a specific time. It is decision-specific and time-specific, because someone may have the ability to make one choice yet lack it for another, and that ability can change as the person’s condition, medications, or circumstances change. It’s not a global attribute that applies to all decisions, and it isn’t the same as legal competence, which is a formal status determined by separate standards. Age alone doesn’t determine capacity. For example, a patient might reliably understand and consent to a simple test but struggle with the complex risks of a major procedure, or capacity might fluctuate if someone is acutely delirious or under heavy sedation. The key idea is that capacity is specific to the decision at hand and can vary over time.

Capacity in medical decision-making means what a patient can understand and decide for a specific situation at a specific time. It is decision-specific and time-specific, because someone may have the ability to make one choice yet lack it for another, and that ability can change as the person’s condition, medications, or circumstances change. It’s not a global attribute that applies to all decisions, and it isn’t the same as legal competence, which is a formal status determined by separate standards. Age alone doesn’t determine capacity. For example, a patient might reliably understand and consent to a simple test but struggle with the complex risks of a major procedure, or capacity might fluctuate if someone is acutely delirious or under heavy sedation. The key idea is that capacity is specific to the decision at hand and can vary over time.